Related Clues:

• All there, so to speak
• Top-class detectives initially left in clear
• It's clear the police need a bit of luck
• Request for a reply? Enter name that's reasonable
• Clear cover protecting caps?
• Explicit girl in Beatles' song heard with diamonds
• Clear as day
• Clearly expressed
• Sound made by swans and nesting eagles at first
• Not loony
• It's sound, mind, and I'm just sayin' it as it is
• Logical and consistent
• Mentally together
• Have all the faculties backing university in touch with police
• Mentally with it